Feet to Inch Converter
Length · unit-converter
Convert Feet to Inch with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use SI-based definitions (international yard, nautical mile, etc.).
Calculator
From: Feet (ft)
To: Inch (in)
About Feet
Feet are imperial and US customary units of length; each is exactly 0.3048 meters. Twelve inches make one feet; feet are common in construction and human-scale dimensions.
About Inch
The inch is an imperial and US customary unit equal to exactly 0.0254 meters. Twelve inches equal one feet; it is used for screen sizes, tools, and fine measurements.
How to convert feet to inches
1 feet is equal to 12 inch:
1 ft = (0.3048 m ÷ 0.0254 m) in = 12 in
1 feet = 12 inches (exactly).
Each feet is defined as 0.3048 m and each inch as 0.0254 m, so one ft equals 0.3048 ÷ 0.0254 in = 12 in.
Let d(ft) be the numeric value of the same length measured in Feet (ft), and d(in) the value in Inch (in). Then:
d(in) = d(ft) × (0.3048 / 0.0254)
Equivalently, divide by how many ft fit into one in (meters per in divided by meters per ft):
d(in) = d(ft) ÷ 0.08333333333333
Or: inch = feet ÷ 0.08333333333333
Examples
Example #1: Convert 20 ft to inch
20 ft = 20 ft × (0.3048/0.0254) in = 240 in
20 ft = 20 ft ÷ 0.08333333333333 = 240 in
Example #2: Convert 50 ft to inch
50 ft = 50 ft × (0.3048/0.0254) in = 600 in
50 ft = 50 ft ÷ 0.08333333333333 = 600 in
Summary
To convert Feet to Inch, multiply the value in ft by the ratio of meters per ft divided by meters per in. Equivalently: value_in = value_ft × (0.3048 / 0.0254). Numerically, 1 ft equals 12.000000000000002 in.
Relationship context
Both units belong to US customary / imperial length. Conversions often use simple ratios (for example inches and feet), while miles relate to yards and feet through fixed definitions. The numeric factor used here is traceable to the international inch (0.0254 m) and related definitions.
Conversion tables
| Feet (ft) | Inch (in) |
|---|---|
| 0.1 | 1.2 |
| 1 | 12 |
| 2 | 24 |
| 3 | 36 |
| 4 | 48 |
| 5 | 60 |
| 6 | 72 |
| 7 | 84 |
| 8 | 96 |
| 9 | 108 |
| Feet (ft) | Inch (in) |
|---|---|
| 10 | 120 |
| 20 | 240 |
| 30 | 360 |
| 40 | 480 |
| 50 | 600 |
| 60 | 720 |
| 70 | 840 |
| 80 | 960 |
| 90 | 1,080 |
| 100 | 1,200 |
Conversions outside the hub list
The grid on the category page lists hub units only. These pairs include at least one unit outside that hub set (same tools: formulas and tables on each page).
- feet to nmiFeet to Nautical Mile
- feet to chainFeet to Chain
- feet to fathomFeet to Fathom
- feet to umFeet to Micrometer
- feet to nmFeet to Nanometer
- feet to angstromFeet to Angstrom
- feet to pmFeet to Picometer
- nmi to inchNautical Mile to Inch
- chain to inchChain to Inch
- fathom to inchFathom to Inch
- um to inchMicrometer to Inch
- nm to inchNanometer to Inch